Hand-operated shearing tool



Sept, 20, 1932. F.7YD. LLNGwooD y 1,878,500

' HAND OPERATED sHEARiNGmooL Filednec. 2s, 1951 y. c UNITD; .51TTesfearam;,orales Patented Sept. 20, 1932l Y 1 FREDERICK DONALD;,L1Newooi), "or LONDON,ENGLAND,v AssIe'Nf'JR To' jf ing the awsLIMITEnoF LONDON, ENGLAND,

i nAND-ToPnRAr'nD AcoMPANY enfermar Dm'rarN f SHEA-*RING TOOLApplication fue'anecemter 28,1931, serial No. 583,550, ana'infer'eafBritain ir'unefz, 1931i s This invention ,relates to, hand-operatedshearingtools and has for its object to lprovide an improved shearingtool Vwhichwillbe capable of severing miniature lgirdersk and likemembers formed, i for example, of lami-V nated sheet orrstrip metal.

A hand-operated shearingtool according to the presentinvention,moreparticularly for severingv miniature 'girdersf formed of laminatedsheetor stripvmetal, comprises twov pivoted jaws the cooperatingshearingportions of whichare formedat the outer ends of the jaws whileparts of the jaws-between the shearing portions and the 'pivot connectfare cut awayto Vprovidea gap between the jaws which vvillacconiniodatethe `flange of a girder,"theshearing portion of one jaw of the ytoolbeing formed with a r fiat face of appreciable area actingas an anvildal N that oftherpart also similarlyV formed with the. front of the tosupportfthe part of the girderito be sheared and'one edge of the anvilfaceco-acting in the shearing operationdwith a part Aofthe. other jaw.which is formedjask a knife'redge.` Preferably the front ofthe'anvilpart which cooperates withthe said `knife'edge isformed flat with astraight cuttingedge, while .the back of the `anvil .part so z formedeither curved or bevelled as to provide yclearance which will permitoffcuttingv through girder or like members at a substantial kailgletothe length of such members without-.the anvil part fouling the-girderflanges or other'parts which mayv liein .planes at right angles .toactually being sheared at anyy moment.. y Y In a convenientarrangementlthe fba'ckof the anvil partis cut away oroppositely bevelledoff so as to give to this partanapproXi-, mately triangularcross-sectionV in--planes parallel to the anvil `faceonzwllich the metalto besheared rests` 'f The backoft the knife edge portion; of thecutting jaw, i. e. thepart lying remote from the front face of this jawwhich cooperates anvil, is conveniently curvedv or .oppositely bevelledofi so' that this knife edgerpart, while it will permit .girdersor likemembers to befcut through at a :substantial angle to v 'referredpto webof a rgirder to Blfof the cutting-j ve,A is D also robust construct; Dtion. .,lhdrthe'r,l a stop is preferably providedv tolimitthelnovementgofthe jawsltowards one another afterthe shearingoperation is completed, thus'tencling to p'reventfdistor-V i Y tionkoffrthe ymetal'sheared due to the knife edge jaw beinggforced topanunnecessary eXty. tentthrough the slot cut during shearing.

. The invention may be carried intopractioe vin various'waysbutonefconstruction of tool according `to this linvention is illustrated bywayv of examplein the Iaceompanying drawing,jin-whicl r` v y L, j

'Figurefl is a side elevationofthe complete tool, 'Y of thetool shown inFigure FigureA B is V Figure 14,

Figure Zie a perspective viewof jawsj l l a Sectionon' the line aff-refYFigure 4 is :an end lview of the tool shown vin Figure Land -Y zFigureisapplanofl the tool shownin-Fgure lfindicating-,ho-w "thetool In .theconstruction comprises an anvil jawA and a fcuttin'g aw B pivotedtogether at handles-D between whichflies aspringE tending tto separate'thesel handles.

The. .6nd part Allofthe anvil-jaw can belusedlto sever agirderdiagonallyg', f f A illustrated the ytool C Vand provided lwith L',Asshown the Y endsvof'thejawsA and ,Bfr mote fromithe formedafshownwith aflat'lippe/IlsurfaoeA2 Y constituting anVV anvil on which canlrestV vthe be severed, while ,the end the partremotefromthecuttingedge,isl cut .away 'or oppositely bevelled off `as shownat v A3 so ythat the part A1v is of .triangular cross;

section in planesparallel .to-the -anvilface A2 Y as sho-wn in Figurev2. Similarly thetak' Y of 'the paI'tBL ,off the jaw-B isoppositely.bevr- Y ed aw Bisform'ed asa knife Vduring the shearingoper-j` f recess adjacent .the pivot 50, shearing operation is r tingdueto the cutting j aweB to vany considerable extent through-theslot tosecure by'Lett'ers Patent isz-4V edge fwith wh f, rangement of, the

elled oifas shown at B2 in Figure 5, while the part C1 of eachjawpforming the end ofthe (l is bevelled or rounded as shown.

f In cutting a miniature girder the part of., the girder which; is to beused is placed on.

the faceA'of thea-nvil part A and, by reason of the area ofv the faceAz'of this jaw,

this part of the girder during the, shearing operation" will' tendnotfto, be benty or distorted but will 'be cut oif cleanly. Further,

owing to the triangular cross-section of the art A1 and the manner in.which the jaw B is bevelled oatB'? aswell as the dimensions of therecess F and the-bevelling of the part and-right'up to its flangeseitheriii a direction atright angles to the length of the girder ordiagonally at any angle up tov approximately dinal axisv of fthev girderof thetool fouling theVV girder flanges: manner-in which' this`construction Vand arparts mal'res it ypossible to seveiydiagoinally thewebs of miniature girders is indicated in 'Figure 5.v f A stop Czisconvenientlyprovided tolimit the-amount vwhich the'shear'ing portions A1and ,B1 of' thejaws can overlapwhen vthe completed, thus prewithout anypart venting distortient of B1-'being'forced Guti-iff, c* Y, Y

It is to be understood thatthe construction illustrated isj-given bywayo i example onlyk and that `con'structionaldetailsv may'- bemodified-without departing from thisf invenha't'I-fclaiin las myviniiention and desire vrLGAhand-operatedshearingtool 'eringminiaturegirders including in combination'two jaws, apivotalfj oint connectingone' end of. one jaw to one end of the vother jaw,Vl thejawsbeingoppositely recessed between `the pivotal "joint and their freeends toprovide a gap' which will accommodate a lan'ge of agirderwhose web isbeing severed, a lniite edge on the outer endofv oneof therjaws formingla secondfshearing portion on the outer end of the' other *jawl having aplane ace'constitut' ing an anvil 'for vsupporting thepart Vof thegir'derlto bel she'ared ,andi having a? straight ,'ch the -flrstshearing-portion (Eo-operates, the secondk shearing portionbeingitapered`towards the igapfformed'by-the recessesin thefjaws so as to" allow thegirder flangetolie in this'gap without oulingtlie shearing'portionsduring shearing of the web f 'at` angles "otherthan at right vangles ytothe len'tghof the'fgirder.l

" 2i-A"'handoperated'shearing toolirforsev-y va'miniature girder can'beinserted between 'the' jaws and itsweb' vcut diagonally-v completelyacross that a girder flange can to the longitu` Y The' theJjaws beingthe girderafter 'centr for sevfirst 'shearing portion, a

ering miniature girders, including in combination twojaws, a pivotconnecting one end `whose web is being severed, a knife edge onVY thefree ,end of onel of'said jaws and forming a first shearing portion, awedge-shaped anvil YApart `at. lthe'freeend of the other'jawvconstituting'the other shearing portion and havingV a substantiallytriangular plane face for supporting the part of the girder to be ysheared, one edge of the triangular `face cooperating witli the iirstshearing member to shearthe girder web, while kan apen ofthe wedge-likeanvil art is directed towards the. gap formed by t e recesses in thejaws so lie in this gap with-. out foulingthe shearing portions kduringthe shearing ofthe webV at angles inclined to the f length of thegirder.Y

3. A' hand-operatedy shearing tool for severing miniaturegirdersincludingin combina tion two' jaws, a pivotal joint connecting one endof one jaw to-one end of the other jaw,

oppositely" recessed between the pivotal jointand their Itreeends to'accom-v modate between them aflange 'ofl a girder whose web'is beingsevered, upperand lower block-like `shearing membersk respectively onthe free ends of the jaws each having a vertical 4face lyingsubstantially in the plane of shear, kthe upper' face ofthe lower blocklying at'right angles to its vertical face and-consti? tuting ananvilfor supporting the part of the girderto beshea'red,while the loweraceo theu-pper bloclri's inclined at an angle to its vertical ace'toform therewith ya knife edge,

' both blocks beingtapered towards said pivot joint to allow. saidgirder -flangeto be accom"- modated at'asubstantial angle to-the axis ofthetool; l f

- 4; A hand-operatedshearing tool for sever-` ing miniature .girdersincluding `in .combina-y tion twol jaws, a pivotal joint connecting oneend of one jawvtoponeY end of the other jaw, the jaws being oppositelyrecessed'between the pivotal joint and their outer ends so as toprovidev a gap Vwhich will accommodatera iiange'o'f agirder whose web isbeing severed,

cooperating shearing portions on the er outer ends ofthe aws one ofwhich is formed with alatifaceacting as an'anvil for supporting thepartofrthe girder to be sheared while the other is tapered toprovidealrnife.-like'shear ing edge, and a stop for determiningthemaxi#v mum extentv to which thecooperatinglshearing-portionscanjoverlapf v,

V5. Anand-operated shearing tool for severing miniature Agirdersincluding 'inl combinationtwo`jawsa pivotal joint connecting onev endoi`one jaw to one end othe Vother jaw,rthe

jaws -being oppositely recessed 'betweenf pivotal jointsand their outerends to provide said Y agap which will accommodate a flange of thegirder whose web is being severed, cooperating shearing portions on theouterends of the jaws one of which is formed with a flat face* acting asan anvil for supporting theend of 1 p the glrder to be sheared,jwhilethe other is tapered to provide a knife-like shearingedge4 v eachshearing member being tapered both towards its end nearer to and towardsits end remote from the gap formed by the recesses 'in the jaws so as topermit the tool to sever the web of a girder at a substantial angletothe length of such girder without the shearing portions fouling eitherofthe iangesy of .the

girderv. 4 f

6. A hand-operated shearing tool for sever'- ing miniature girdersincluding in combination two jaws, a pivotal joint connecting one end ofone jaw to one endof the other jaw, the'jaws being oppositely recessedbetween the pivotal joint and their outer ends to provide a gap whichwill accommodate a ange f of a girder Whose web is being severed, co-

acting shearing portions on the outer ends of the jaws one of which isformed with a flatV face acting as an anvil yfor supportingf the part ofthe girder to be sheared, while the other is tapered to provide aknife-like shearing edge, each shearing portion beingt'apered gobothtowards its end nearer to and towards itsend remote fromthegap formed bythe recesses in the jaws so as to allow the tool to shear the web of thevgirder at a substantial angle to the length of such girder without theshearing portions fouling either of the gir-der flanges, and a stop fordetermining the Y extent to which the shearing portions can overlap. i

In testimony whereof Ihave `signed my o name to this specification.

FREDERICK DONALDy LINGWQOD.

